If only artists could hold copyrights to their works, this wouldn't be an issue.

Corporations are usually not the ones who create art, they just hire people who do. If Disney spends an astronomical amount on money on hiring artists and producing a work, there should be a separate set of laws that protects them from someone sweeping in and stealing the franchise or the product. It shouldn't be down to copyright-laws, because Disney isn't an artist.

Copyright also grants the right to opt out of the commercialization of your work. Even if you really like a painting I have done, you should not have the right to demand that I or someone else sell prints of it. If I instead want to just keep it on my Instagram profile, in my attic or hanging on the walls of a gallery, I should be free to do so.

If you make something public people have the right to look at it and to get inspired by it, but I don't think it's unfair to ask that the artist retains the commercial rights to it.